SITE.su is an online marketplace for premium domain names, offering more than 40,000 listings, primarily in the .ru, .su, and .рф zones. The store serves individuals, businesses, and project owners seeking a distinctive web address, with domain names available for immediate purchase or rental. Buyers can complete purchases online, with domains transferred immediately; rental arrangements allow customers to use a domain by assigning their own DNS servers. The marketplace also offers rental with a guaranteed right to buy, providing a path from temporary use to ownership.

Customers can browse the full domain catalogue, download listings as an Excel file, or use advanced search to find names by keywords and other parameters. Listings include pricing for purchase and monthly rental, and may show details such as domain age, ratings, and search statistics. Customers interested in a specific name can ask a question or make an offer, and support is available through the Help section, including online chat.